The stress and exhaustion of long hours could be as bad for the brain as smoking"

Those doing the most overtime recorded lower scores in two of the five key brain function tests - reasoning and vocabulary. -- or dare I suggest that sub-standard reasoning and poor debate skills might themselves lead to the subject being hoodwinked (by themselves or others) into working those hours? As a monk once told me, "No one diagnosed of a terminal disease ever wished they'd spent more time at the office."